Metallurgical-furnace part.



l W. W. CASE, JR.

MBTALLURGIGAL FURNAGE PART. APPLICATION FILED SEPT. z2, 1913.

Patented Jan. 27, 19,14.

lll-llltmlllllllllilll miren WSTATES PATENT @Freien .WILLIS w. cAsE,Jn., or DENVER, coLoRAno. y

METALLURGICAL-FURNACE PART.

Application med september 22, 1913. serial No. 791,128.

To all AL11/omit may concern:

lie it known that I, WILLIS NV. CASE, Jr., a. citizen of the UnitedStates, residing in the city and county of Denver and State of Colorado,have. invented certin 'ne-W and useful Improvements in Metallurgical-Furnace Parts; and I do hereby declare the f lfollowing vto be afull,clear, and exact de- 1 -scription of the invention, such .es willen l able others .skilled in the art to which it appertains to make anduse vthe seme.

`LThls invention relates to metallurgical gfurna-ce parts, and moreparticularly to a i 'crucible nud :its mountngpinseid furnace, 4.-15whereby the same may be-used `as `a Crucible '.-pmper or converted intoa retorh v y In the present application I do-not'lclam the speciic formofurnace with its lining, comprising .a plurality of 'losly spacetime--2o ractory vprojections engaging' the walls of the crucible, whichfeature is claimed in my Patent-#1,066,995, patented July-8,.

1913, although for thepurpose 'of a com- .pletedisclosnnerefrence lishad to .thenc- A 'dra 7 `:.illustrativi@"1L'prato--v tical; em irnent iomy invention nsfnp .plied to-awtilting furnace,` and the particu#features of noveltyothe seid' invention will be pointed-outwmoreprecisely v.in the claims..

In the drawings forming@ part of this application numerals-designate.the lsainepai-rts iii-throfseeml-.-views,v in .Which- Figure 41 centralvertical. sectional f 3.5"vewthrougha Ytilting fulmaceembracing myinvention. Fig. 2 isa "top-'plan View ofthe Crucible lid. Fig Sis aside-elevation of saidlidlookingin the Vdirection of the'V arrowinFlig."f2. Fig.' t.tris a' fragmentary i 4o-:vertical sectional viewfonthe line LA of'- v .'Fig. l looking inthe direction of the arrowk,

ig. 5 is a fragmentarysectionul View show- .ing `alsligliitlymodifiedform of the spout' of thel crucible associated with the lining7tuteuessential:featuresof the present invention, they may be brieflyreferred to as com- .prising an iron sheathing l incasing the -furnacewalls 2 the furnace being provided.

with u lower chamber 8, and an upper cham- 55 ber 4, seid upper chamberbeinglined with blocks 5, provided on their inner faces with a pluralityof closely spaced heating pro- ]etwns adapted to engage a Cruciblecontained therein and supported by the legs 6 oi' a pedestalxuounted insaid lower cha-mber 3. The upper chamber 4 and the lininf:r blocks 5 arecurved as shown to com ly with the upwardly curving contour of`tcrucible hereinafterreferled to.

7 designates a suitable support, secured to the lining, on which ismounted .a vertical sleeve 8, containing a vertically'.reciprocating'splndle 9, said spindle carry- ,-1ng a Arotary',support10. 'The rotary support 10 1s provided with an operating lsrarndlell andan arm-12, which arnrs connected with an iron-hand 13, surrounding andsecurely attached to the .furnace .cover 14,--wh1ch-1s provided with acentral lfimd which cover .may be stayedfrom said support 1Q.' bysuitable. stay rods 16. '17 .is a plug-for closing an opening, leedmgfrom the/bottom chamber 3 .to withdraw Specification of Letters Patent.Patented Jan, 27,1914

any'moLten motel should the crucible from any .cause break, .and 18 isapawl controlled lever tor reciprocating the spindle Ai), where` by theletter end-the cover 14, .may be lifted olf of the furnace and revolvedlaterally from above .sameby .the handle '11,.

1S-is a discharge spout-:formed 4.it-he- .topedge of .the furnace wall,and is substantmlly semicylndrical inv cross-section.

In. thepresent application I ldo `not claim vany features broadly lthusfar described, .as they haver-:been claimed in my Y*forllher patentreferred to, covering .they

type of'tilting furnace mantiene *Inimy present inventiomfl enfploy andclaim a particular type' of' Crucible, .which .may Vbe utilized with .afurnace, as .a 6111101-,

.ble pense, and .whiclralso may lhe converted intonl a. retort, a veryimportant feature to those engagedin metallurgical pursuits.

j'ihe' .trough 19, broadly referred'k, .is proffvided with .u lining `20ofeny .suitable ma terial, but preferably formed of .plumbago,

fund is substantially' semi-cylindrical to lit said discharge trough,the inner 'edg of said l.ining20 bei-11g .provided withyan iu- .ticu-lartex-nal flange 21. The' crucible'22 is formed i -with a short spo-.1t23,01? subutantially semi cylindrical contour, adapted to snugly rest onauldpbesnrroundedbvv the'internal flange 21 of tho/lining 20.. The'short spout 23 is not in the nature of a-.lip discharging et the topedge of thecrucible but the lower Surfacef -the .spoutV extends at righiangles to the major axis of the' Crucible, and is-cut awayina verticalplane, as at 24, forming an open ended spoutof substantiallysemicylindricaly construction, the base 'or pourthan the crucible willcontain, the bottom of the spout 23, being located a considerabledistance belowl the top edge of the Crucible proper, the molten metalwill 'iiow out through thel trough before it canreach the top edge oftheCrucible, which will prevent ered .furnace lining from destruction. Alsoshould-such acondtion arise, and the metal begin-to flow out of thespout into the trough .19, the internal ange 21-vvi1l prevent the,metalv from slopping backwardlythrough vthe trough between-the sameandthe cruci ble spout, so that. under no conditions can themoltenmetalcome in contact1,v`vith the furnace lining from uany such causes.

In converting the crucible' to a retort I9 providea-cover'2-5 ofpeculiar formation Jas -s'hown in Figs. 1 to 4, and'which-is substanj-ftiallyV circular for lthe greater portion Aof its area, merging into `ancntension'or lip 26 which terminatesin alstraight edge 27 forming acover lfor the spout of the crucible, while the circular -portion formsa lid for the cruci ble proper, t cls underneath face of the lid orcover provided with an annular recess 28,'1forming a-circular projection29, "the said :recess 28 providing a seator ledge engagingl the top edge-of the crucible, and

the said circular projection 29 snugly fitting the intei'iorwalls of thecrucible around the major portionof its upper edge. This lid or covervis. also provided on its-upper face with a central boss 30, which curvesdown-k wardly and merges into the upperfaceof the lid.` The lid and bossmay also be pro videdwith a small central bore 31, said boss beinadapted to project a short dist-ance within the opening 15 of thefurnacecover. The lid may also be provided if desired with a raised reinforcingportion 32, pro]e'cting from the body of the lid along the: extension26, as shown more clearly in Fig. 2.x The underneath face of the furnacecover 14 s recessed as yat 33 providing a flanged base 34 forsupportingythe' cover onlthe furnace, the recess being -of such 'a depthand of such a diameter that -it forms, with the outer surface of theCrucible lid, a passageway forcarrying o- .the products of combustion,which pass lupwardly and through the furnace,\ betweensaid checkereworkof heater from the retort'may ass outwardly through the aperture531,Wherethe lid is provided with such aperture, nl Fig. `6 there isshown, however, a .lid 25` similar to the lid 25, with the'e'xceptipnthat the same is not provided with 'the aperture 31, and Where such aVlid is' employed the discharge of fumes 'from the "Crucible-retortwould `be through theope'n endedspout 23.

--In Fig. 5 there is shown a slight Vmodificationwherein not only is thelining 20 provided with an internal flange 21, but the spout 23'L isalso provided on its outer end with a -depending flange 21, forming athe molten metal from slopping over the topedge of thecrucible andbetween it and the furnace lining, thereby vthe checkmore compactjoinder-between the spo'ut and plumbago lining, to prevent backslopping,

as previously mentioned. v

From Vthe foregoing detailed descriptionV it is not. believed to benecessary to further describe the operation of the invention, foras-befpre aexplained,iino claim is rmade to the'open ended s'pc'uv23,`a`nd also through the `furnace proper/or to the tilting featuresHaving thus described lmy invention, )what I claim'isz- 1.4 As a;metallurgical furnace part, a

'icruciblehavingan'opn upper end provided cyvitli a 4short spout ofsubstantially semi l vcylindricalconstruction andcut awayat rightvangles Mat its outer. end, forming adischarge surface .substantiallybelow heitop edge of the crucible,- the outer surface of said spoutbeing provided with an external peripheral flange, surrounding thedischarge end ofsaid spout.

2." Asametallurgical furnace part a convertiblecrucible-retort,`comprising a crucible proper, vopen at ,its upper end.and prol vided, with anopen-en'ded short spout disposed at right anglesto the vertical axis of vsaid crucible, said spout being substantiallylsemi-circularin'crosssection, and a lid provided-fion its underneathface with an annu-I lar recess forming a ledge-adapted to seat snugly`on the upper edge of said crucible, said cover being provided with anextendin'g lip .orotherwisef agiaptedto cover said spout, and said. lidbelngalso provided on its upper face with a central boss, curvingdownwardly 'topmeet thefupper surface of 'the lid.

13. A crucible for'metallurgical furnaces having an open upper endprovided with a short spout, substantially semi-circular incress-section, said spout being open-ended and disposed. at right anglesto the major axis of said-Crucible, and a substantially send-circular4lining, forming a. pouring trough adapted t0 b mounted on the furnaceand provided at its inner end with an inturned l'angeV adapted te seatthe outer- Curved spout projecting horizontally therefrom providing adischarge surface substantially below the top edge ofthe Crucible, theouter surface of `said spout being provided with an external peripheralflange, and a curved lin'ng forming a pouring trough, adapted to bemounted on said furnace and rovided at its inner end with an inturnedange adapted to seat below said spout on the inside of its external-flange.

5. The combination With a metallurgical furnace of a Crucible mountedtherein and provided at its u per open end with a horizontally disposer?curved spout open at its top and outer end, providing a dischargesurface substantially below the top edges of the Crucible, a lid forsaid crucible having an annular recess on its underneath face providinga ledge adapted to snugly seat on the top edge' of said crucible, saidlid being provided With an extending lip or otherwise adapted to coverthe upper portion of said spout, a central boss formed on the upper faceof said lid, and a removable cover for said furnace provided with acentral aperture and a recess on its lower face, for forming apassageway between said furnace cover and Crucible lid to conduct theproducts of combustion through said central opening.

In testimony whereof I aiiix my signa ture, in presence of twoWitnesses:

WILLIS W. CASE', Jn.

Witnesses:

EDW. S. STEWART, J. S. GINsTA.

